Reminder: Xbox LIVE's One Day Spring Sale begins and ends today

This is not a joke. I know every April Fools' joke starts off that way, but as promised, Microsoft revealed its special one day Spring Sale. While the Xbox LIVE Spring Sale technically began last week with a slew of discounted Xbox 360 DLC, today we see several more downloadable content packs discounted. I'm not sure what makes these so special, but for whatever reason they are only available today. As for the other items on sale, that ends today as well.